bdf97a004b
Create the framework to support external dp aux bridge device which can handle DPCD/I2C/HPD from external. Change-Id: Iabd0998efc8bf7134d186b1751d219c00217385c Signed-off-by: Xiaowen Wu <wxiaowen@codeaurora.org> Signed-off-by: Karim Henain <khenain@codeaurora.org> Signed-off-by: Sudarsan Ramesh <sudarame@codeaurora.org>
125 sor
2.6 KiB
C
125 sor
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2012-2021, The Linux Foundation. All rights reserved.
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*/
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include "dp_hpd.h"
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#include "dp_altmode.h"
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#include "dp_usbpd.h"
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#include "dp_gpio_hpd.h"
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#include "dp_lphw_hpd.h"
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#include "dp_debug.h"
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#include "dp_bridge_hpd.h"
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static void dp_hpd_host_init(struct dp_hpd *dp_hpd,
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struct dp_catalog_hpd *catalog)
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{
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if (!catalog) {
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DP_ERR("invalid input\n");
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return;
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}
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catalog->config_hpd(catalog, true);
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}
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static void dp_hpd_host_deinit(struct dp_hpd *dp_hpd,
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struct dp_catalog_hpd *catalog)
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{
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if (!catalog) {
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DP_ERR("invalid input\n");
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return;
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}
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catalog->config_hpd(catalog, false);
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}
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static void dp_hpd_isr(struct dp_hpd *dp_hpd)
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{
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}
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struct dp_hpd *dp_hpd_get(struct device *dev, struct dp_parser *parser,
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struct dp_catalog_hpd *catalog,
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struct dp_aux_bridge *aux_bridge,
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struct dp_hpd_cb *cb)
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{
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struct dp_hpd *dp_hpd;
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if (aux_bridge && (aux_bridge->flag & DP_AUX_BRIDGE_HPD)) {
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dp_hpd = dp_bridge_hpd_get(dev, cb, aux_bridge);
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if (IS_ERR(dp_hpd)) {
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pr_err("failed to get bridge hpd\n");
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return dp_hpd;
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}
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dp_hpd->type = DP_HPD_BRIDGE;
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} else if (parser->no_aux_switch && parser->lphw_hpd) {
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dp_hpd = dp_lphw_hpd_get(dev, parser, catalog, cb);
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if (IS_ERR_OR_NULL(dp_hpd)) {
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DP_ERR("failed to get lphw hpd\n");
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return dp_hpd;
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}
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dp_hpd->type = DP_HPD_LPHW;
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} else if (parser->no_aux_switch) {
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dp_hpd = dp_gpio_hpd_get(dev, cb);
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if (IS_ERR_OR_NULL(dp_hpd)) {
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DP_ERR("failed to get gpio hpd\n");
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return dp_hpd;
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}
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dp_hpd->type = DP_HPD_GPIO;
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} else {
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dp_hpd = dp_altmode_get(dev, cb);
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if (!IS_ERR_OR_NULL(dp_hpd)) {
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dp_hpd->type = DP_HPD_ALTMODE;
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goto config;
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}
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DP_WARN("dp_altmode failed (%ld), falling back to dp_usbpd\n",
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PTR_ERR(dp_hpd));
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dp_hpd = dp_usbpd_get(dev, cb);
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if (IS_ERR_OR_NULL(dp_hpd)) {
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DP_ERR("failed to get usbpd\n");
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return dp_hpd;
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}
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dp_hpd->type = DP_HPD_USBPD;
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}
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config:
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if (!dp_hpd->host_init)
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dp_hpd->host_init = dp_hpd_host_init;
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if (!dp_hpd->host_deinit)
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dp_hpd->host_deinit = dp_hpd_host_deinit;
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if (!dp_hpd->isr)
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dp_hpd->isr = dp_hpd_isr;
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return dp_hpd;
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}
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void dp_hpd_put(struct dp_hpd *dp_hpd)
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{
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if (!dp_hpd)
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return;
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switch (dp_hpd->type) {
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case DP_HPD_USBPD:
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dp_usbpd_put(dp_hpd);
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break;
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case DP_HPD_ALTMODE:
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dp_altmode_put(dp_hpd);
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break;
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case DP_HPD_GPIO:
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dp_gpio_hpd_put(dp_hpd);
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break;
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case DP_HPD_LPHW:
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dp_lphw_hpd_put(dp_hpd);
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break;
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case DP_HPD_BRIDGE:
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dp_bridge_hpd_put(dp_hpd);
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break;
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default:
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DP_ERR("unknown hpd type %d\n", dp_hpd->type);
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break;
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}
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}
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